Order of problems in feedback
It seems to me that the problems in the emails sent as feedback appear alphabetically. I would find it more logically if the order in the feedback was the same as the order in the test.
For example I have 15 multiple choice questions which I named MC1, MC2, ..., MC15. When I send the feedback it is order as MC1, MC10, MC11, ..., MC15, MC2, MC3, ..., MC9. Luckily the multiple choice questions MC come before the open questions OQ both in the test and in alphabetic order. (The "Extra space" at the end of the exam I have renamed "Supplementary space" in Zesje to make it come last in the feedback.)